Dayco Automatic Belt Tensioner for Audi A4 A5 A6 A8 Q5 Q7 Volkswagen Touareg

Dayco No Slack Automatic Belt Tensioner

Designed to maintain constant tension on serpentine belt drives
Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories.

To maintain the proper tension throughout the drive, an automatic, spring-loaded tensioner is incorporated into the drive system geometry.

Dayco’s Automatic Belt Tensioner features a patented “flat spring” design that’s engineered to provide less operating range variations in tension.

This reduces the risk of premature accessory bearing failure due to high tension when a new belt is installed.

It also lessens the risk of belt squeal and slippage, or poor accessory performance caused by low tension after the belt begins to stretch and wear. A Teflon strip wound within the spring resists abrasion.

The flat spring itself is coated to resist rust.

Other superior design features include a steel locator pin (where the application demands).

A heavy-duty cast aluminium spring case resists cracking and fatigue. The heavy-duty cast aluminium arm offers additional strength and less distortion.

An aluminium retainer ring locks the spring case and arm together, and seals against corrosion.

A steel pivot tube (where the application demands) provides additional strength for critical torque requirements.

A thermoplastic rubber “spring slot plug” keeps out harmful contaminants. The lubricated nylon “pivot tube bushing” and “spring bushing” promote quieter performance.

A rubber “O” ring seals against dust and grime.

The zinc coated mounting bolt resists rust, and is concentric for a more even degree of constant tension.

In order to meet OEM performance standards, Dayco Automatic Tensioners come with either a glass-filled polymer (plastic) or steel pulley, that features a dust cover to protect against contaminants.

Fits the following Make, Model, Series:

Audi > A4 > 2005 - 2007, 3.0L, V6, 24V, DOHC, MPFI, Turbo, Diesel, B7, 150kW, EngCode: BKN

Audi > A4 > Jul 2006 - Mar 2008, 3.0L, V6, 24V, DOHC, DTFI, Turbo, Diesel, B7, 171Kw, EngCode: ASB

Audi > A4 > Apr 2008 - Jun 2012, 2.7L, V6, 24V, DOHC, DTFI, Turbo, Diesel, B8, 140kW, EngCode: CAMA

Audi > A4 > Jul 2008 - Jun 2012, 2.7L, V6, 24V, DOHC, DTFI, Turbo, Diesel, 140kW, EngCode: CGKA

Audi > A4 > Oct 2008 - Jun 2012, 3.0L, V6, 24V, DOHC VVT, Di, Turbo, 176kW, EngCode: CCWA

Audi > A5 > Oct 2008 - Feb 2012, 3.0L, V6, 24V, DOHC, DTFI, Diesel, 8T, 176kW, EngCode: CAPA

Audi > A5 > Oct 2008 - Feb 2012, 3.0L, V6, 24V, DOHC, DTFI, Turbo, Diesel, 8T, 176kW, EngCode: CCWA

Audi > A6 > 2006 - 2008, 2.7L, V6, 24V, DOHC, CRD Turbo, C6, 130kW, EngCode: BPP

Audi > A6 > Jul 2009 - Jun 2011, 2.7L, V6, 24V, DOHC, CRD, Turbo, Diesel, C6, 140kW, EngCode: CANA

Audi > A6 > Jul 2009 - Jun 2011, 2.7L, V6, 24V, DOHC, CRD, Turbo, Diesel, C6, 140kW, EngCode: CANC

Audi > A8 > Apr 2008 - Aug 2010, 3.0L, V6, 24V, DOHC, DTFI, Turbo, Diesel, D3, 171Kw, EngCode: ASB

Audi > Q5 > Mar 2009 - Sep 2012, 3.0L, V6, 24V, DOHC, DTFI, Turbo, Diesel, 8R, 176kW, EngCode: CCWA

Audi > Q7 > Oct 2010 - Sep 2011, 3.0L, V6, 24V, DOHC, DTFI, Turbo, Diesel, 4L, 176kW, EngCode: CJGA

Volkswagen > Touareg > Nov 2006 - Oct 2007, 3.0L, V6, 24V, DOHC, DTFI, Diesel, 7L, 165kW, EngCode: BKS

Volkswagen > Touareg > Nov 2007 - Jun 2011, 3.0L, V6, 24V, DOHC, DTFI, Turbo, Diesel, 7P, 176kW, EngCode: CASA

Volkswagen > Touareg > Nov 2007 - Jun 2011, 3.0L, V6, 24V, DOHC, DTFI, Turbo, Diesel, 7L, 176kW, EngCode: CASA